American Tactical Alpha Maxx Lower and Upper Set Multi-Cal

ATI Alpha Maxx Lower and Upper Set Features The ATI Alpha Maxx Lower and Upper Set is engineered with patented over-molded metal inserts strategically placed throughout the polymer construction to reinforce the highest-pressure areas of the receiver delivering the durability and structural integrity needed for long-term reliable function. Patented hammer and trigger pin locking screws prevent pin walk and maintain precise trigger group alignment through sustained fire and hard use eliminating one of the most common issues associated with polymer lower receivers. Together these innovations address the traditional weaknesses of polymer receiver sets producing a stripped lower and upper that performs with the confidence of a metal build at a fraction of the weight. This stripped AR-15 polymer receiver set is compatible with multiple calibers and built to standard AR-15 dimensions ensuring full compatibility with mil-spec components trigger groups stocks and upper assemblies across the AR-15 parts ecosystem. Note that this set includes only the stripped lower and upper receivers with locking screws - no internal lower or upper parts are included. The matte black finish provides a clean professional appearance that pairs with virtually any handguard stock or furniture configuration for a fully customized build. ATI Alpha Maxx Lower and Upper Set Specifications Manufacturer: ATI Model: Alpha Maxx Lower and Upper Set Color: Black Caliber: Multi Lower Pattern: AR-15 Lower Type: Stripped Material: Polymer with Over-Molded Metal Inserts Features: Patented Hammer and Trigger Pin Locking Screws Includes: Stripped Lower Receiver Stripped Upper Receiver Locking Screws Note: No internal parts included